I just googled for you and have no real experience in what you are asking. So bear with me, I will just ask you some questions that came up in my mind:
Have you made sure what the file/directory is missing?
Does that maybe imply something?
Do you understand what went wrong? Or what might not have been completed yet?
I hope someone with some more knowledge about your subject comes around.
By the way, are you using Ubuntu in the VBox? Since you use adduser I kind of figured that. There is a lot of documentation around, but you might want to try their forum: http://ubuntuforums.org/
. They have a real nice community like we have here.